Polymer Layer-Accelerated CO2 Absorption in Aqueous Amino Acid Solutions DOI
Zewen Zhu, Nitesh Kumar, Uvinduni I. Premadasa

et al.

ACS Applied Polymer Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 23, 2024

Direct air capture (DAC) of CO2 via solvent-based absorption is considered a promising negative-emission technology. However, the low concentration in and slow transport into solvent make DAC notoriously challenging to implement without costly investments. In this study, we explore fundamental role that bulk surface properties CO2-permeable polymer membranes play enhancing efficiency solution sorption process passive CO2. This work leverages various spectroscopic computational studies demonstrate hybrid system, comprising reusable layer placed atop an aqueous amino acid (AA) solution, can outperform pure AA system by 2-fold. We show how enhanced solubility improve phase, while chemistry control interfacial barrier for permeation reactive AAs. The derived knowledge material achieved here aid design systems with improved performance.

Language: Английский

Are enhanced rock weathering rates overestimated? A few geochemical and mineralogical pitfalls DOI Creative Commons
Ian Power,

Victoria N. J. Hatten,

Maolin Guo

et al.

Frontiers in Climate, Journal Year: 2025, Volume and Issue: 6

Published: Jan. 13, 2025

There is considerable uncertainty when quantifying carbon dioxide removal (CDR) from enhanced rock weathering (ERW). Faster CDR rates mean ERW may significantly impact climate change mitigation, and more credits will financially benefit private companies. However, overestimating risks undermining if meaningless are counted. Here, we aim to contribute the discussion of quantification by describing three potential pitfalls relating geochemical mineralogical compositions powders. First, powders used for often mineralogically complex initially exhibit fast dissolution due reactive surfaces phases, leading long-term rates. Second, accessory carbonates within tend dominate cation dissolved inorganic fluxes, which, not identified, can be misconstrued as silicate overestimate CDR. Third, methods that rely on measuring cations prone misinterpretation balanced with carbon, e.g., during strong acid weathering. As another example, mineral solid-phase testing (e.g., exchange) also unrelated carbonic and, thus, To avoid these pitfalls, recommend (1) incorporating high-dosage test plots into trials reapplication replenish reactivity, (2) screening carbonate minerals using sensitive techniques distinguishing weathering, (3) verify removal. High-quality must durable, additional, overestimated.

Language: Английский

Citations

3
Carbonation of MgO Single Crystals: Implications for Direct Air Capture of CO2 DOI
Peng Yang, Jacquelyn N. Bracco,

Gabriela Camacho Meneses

et al.

Environmental Science & Technology, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 10, 2025

Direct air capture (DAC) may be feasible to remove carbon dioxide (CO2) from the atmosphere at gigaton scale, holding promise become a major contributor climate change mitigation. Mineral looping using magnesium oxide (MgO) is potentially an economical, efficient, and sustainable pathway gigaton-scale DAC. The hydroxylation carbonation of MgO determine efficiency process, but their rates mechanisms remain uncertain. In this work, single crystals were reacted in or CO2 varying humidities characterized by X-ray scattering, microscopy, vibrational spectroscopy. Results show that formed brucite (Mg(OH)2)-like layer immediately after crystal cleaving. Concurrently, hydrated carbonate phases, including barringtonite (MgCO3·2H2O) nesquehonite (MgCO3·2H2O), layer. Rapid initial growth also manifested short-range bending/warping nanocrystallites, resulting multiple orientations same phases on surface. slowed down over time, indicating surface passivation. formation with 1:1 CO3/Mg ratio indicates efficient when compared other lower ratio. Our results are essential for understanding passivation tackling issue mineral DAC technology.

Language: Английский

Citations

2
Effect of pretreatment biomass by gas from polyvinyl chloride dehydrochlorination process on maize cob pyrolysis with integrated CO2 capture DOI Creative Commons
Wojciech Jerzak, Izabela Kalemba–Rec, Aneta Magdziarz

et al.

Renewable Energy, Journal Year: 2025, Volume and Issue: unknown, P. 122666 - 122666

Published: Feb. 1, 2025

Language: Английский

Citations

1
Inhibition of Reaction Layer Formation on MgO(100) by Doping with Trace Amounts of Iron DOI Creative Commons

Gabriela Camacho Meneses,

Juliane Weber, Raphaël P. Hermann

et al.

The Journal of Physical Chemistry C, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 11, 2025

Despite extensive research on MgO's reactivity in the presence of CO2 under various conditions, little is known about whether impurities incorporated into solid, such as iron, enhance or impede hydroxylation and carbonation reactions. The purity MgO required for successful implementation looping a direct air capture technology affects deployment costs. With this motivation, we tested how iron impacts (100) passivation layer formation ambient conditions by using atomic force microscopy, electron synchrotron-based X-ray scattering. Based microprobe analysis, our samples were 0.5 wt % Mössbauer spectroscopy results indicated that 70% present Fe(II). We find even these low levels dopants impeded both at relative humidities (10%, 33%, 75%, >95%) (33%, surface. Crystalline reaction products formed. Reaction layers sample easily removed exposing to deionized water 2 min. Overall, findings demonstrate slows rate MgO, indicating without preferable mineral applications.

Language: Английский

Citations

0
Utilization of seafood processing waste as novel precipitating agent in treatment of zinc(II)-contaminated water DOI
Ivona Nuić,

Sunčica Mileta,

Ana Palčić

et al.

Journal of Water Process Engineering, Journal Year: 2025, Volume and Issue: 73, P. 107710 - 107710

Published: April 18, 2025

Language: Английский

Citations

0
Atmospheric carbon dioxide removal using layers of lime DOI

Olivia Hawrot,

Phil Renforth

The Science of The Total Environment, Journal Year: 2025, Volume and Issue: 985, P. 179761 - 179761

Published: May 27, 2025

Language: Английский

Citations

0
Comprehensive Analysis of Straw Steam Gasification Properties Based on Hydrolysis Pretreatment DOI

Zefeng Ge,

Qiuxiang Lu,

Zenghui Hou

et al.

Energy & Fuels, Journal Year: 2024, Volume and Issue: 38(22), P. 22266 - 22277

Published: Nov. 4, 2024

The substitution of fossil fuels with biomass for hydrogen production via gasification represents a sustainable approach to energy generation. This study investigated the impact hydrolysis pretreatment at varying temperatures on straw properties. primary cations removed during process were K+, Ca2+, and Mg2+, anions included CO32– Ac–. As temperature increased, removal content increased finally reached saturated state. Due loss catalytically active inorganic components, both reaction rate syngas quality hydrolytic samples declined. Through application normal distribution hypothesis method, steam was decoupled into volatile char stages, revealing that potassium played pivotal role in enhancing by promoting water–gas shift reaction. led decline yield reactivity, particularly stage. Additionally, structural collapse higher reduced efficiency gasification. Overall, restricted progress volatiles Boudouard char. These findings provide valuable insights optimizing enhance quality, offering practical implications improving industrial biomass-to-hydrogen processes.

Language: Английский

Citations

0
Techno-economic study of a direct air capture system based on the carbonation of Ca(OH)2 plates integrated into cooling towers DOI

Mohammad Hosseinpour,

Bijan Hejazi, Yolanda A. Criado

et al.

Journal of Cleaner Production, Journal Year: 2024, Volume and Issue: unknown, P. 144545 - 144545

Published: Dec. 1, 2024

Language: Английский

Citations

0
Polymer Layer-Accelerated CO2 Absorption in Aqueous Amino Acid Solutions DOI
Zewen Zhu, Nitesh Kumar, Uvinduni I. Premadasa

et al.

ACS Applied Polymer Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 23, 2024

Direct air capture (DAC) of CO2 via solvent-based absorption is considered a promising negative-emission technology. However, the low concentration in and slow transport into solvent make DAC notoriously challenging to implement without costly investments. In this study, we explore fundamental role that bulk surface properties CO2-permeable polymer membranes play enhancing efficiency solution sorption process passive CO2. This work leverages various spectroscopic computational studies demonstrate hybrid system, comprising reusable layer placed atop an aqueous amino acid (AA) solution, can outperform pure AA system by 2-fold. We show how enhanced solubility improve phase, while chemistry control interfacial barrier for permeation reactive AAs. The derived knowledge material achieved here aid design systems with improved performance.

Language: Английский

Citations

0